I just thought I'd offer a couple of the issues that I had with this video, hopefully I don't come across as purely critical.

0.40 "A straight punch is the shortest distance between you and your target."
I had great difficulty digesting this comment. In Boxing I was taught a European style. The Jab was taught as a long straight punch used as a "defensive weapon." The right straight was a powerful scoring punch from range. However, both straight punches and their adaptations for scoring to the body were long range punches. From an audio visual perspective, this coach punches in front of his body, limiting his reach and range in my opinion.

3.25 "I've seen lots of people knocked out with bad left hooks that have done a good job of landing on target."
I see the point here, but feel there is a treacherous flaw in the train of thought. A left hook that lands does carry some force even if technique is less than impeccable. However, a fighter should never voluntarily sacrifice technique for the sake of landing a single punch. Sacrificing the technique of a punch compromises balance, power and most significantly defence.

6.00 "The basic stock standard left hook compromises of only a couple of fundamentals."
I find this statement nonchalant and perhaps negligent. It took me a long time to learn how to throw a left hook and a very good trainer had to take me aside and completely manipulate my technique. It is an easy punch to throw once you know how, but it is my belief this man does not as visually he demonstrates arm punching techniques later in the video.

I hope that I did not come across as negative here. I too am trying to learn and from what I have learned so far I came to those conclusions.